This all new and up-to-date audio field guide of bird songs from Don and Lillian Stokes provides you with the most complete and useful recordings of 551species found in the Western Region of North America. Designed for modern convenience in the field, The Stokes Field Guide To Bird Songs includes one MP3 CD containing all the bird sound files and an informative pdf booklet that gives precise call and song descriptions. This is the perfect companion to The Stokes Field Guide to the Birds of North America.